New function: Thumbs up/Thumbs down

Dear forum organizers,

Recently I realized that instead of writing "I agree on ....", I would like to have a "thumbs up" option for entries. Simply if we have two alternatives similar to " " and "" under each entry, people can vote for the entry they like. It will be nice to see the number of likes/dislikes. Seems like an easy thing to add and would be very useful.